Pump



Patented ct. 23, 1934 PzvriiN'r:l OFFICE PUMP Philip Lane Scott, SanMateo, Calif.,` assignor to Super Diesel Tractor Corporation, La Porte,Ind., a corporation of New York Application October 20,

16 Claims.

This invention relates to a pump and particularly to a pump adapted todelver a small quantity of fluid under great pressure and with greatspeed.

It has for one object to provide a pump in which the mechanical shockdue to the movement of the pump and its driving mechanism is reduced toa minimum. Another object is to provide a pump in which sliding surfaceswithin the pressure chamber are eliminated. Another object is to providea pump in which the walls or a part of the walls of the pump chamber areelastic.

Other objects will appear from time to time in the specification andclaims.

The invention is illustrated more or less diagrammatically in theaccompanying drawing, wherein- Figure 1 is a cross section through thepump, showing the inlet and outlet valves;

Figure 2 is an elevation of the pump, showing in part the Operatingmeans.

Like parts are designated by like characters throughout specificationand drawing.

A is a pump body or housing that is preferably provided in one face witha raised land A1 which co-operates to form a depression or pump chamberportion A2. A3 is a cavity formed in the lpump body A and providedadjacent one end With an inwardly extending shoulder or reducedportionA. An inlet valve housing may be seated in the cavity A3. A5 isanother cavity formed in the body portion A and provided adjacent oneend with a shoulder or reduced portion A5. An outlet valve housing maybe positioned withvin the cavity A5 and may rest against the shoulder orreduced portion A5. Extending .through the body portion A andcommunicating with the pump chamber and with the outside of the pump isan air vent A7. A8 is a controlling valve there-e for, preferablyprovided with a handle .or manipulating part A by means of which it maybe moved into and out of position to control'the air vent. The air vent,while it may be placed in any 'suitable location, is preferably in anextension' A1o formed as a part of the valve body.

Removably secured to the valve body A is a retaining portion B ofgenerally annular shape. It may be fastened to the valve body by screwsB1 or by any other suitable means.

Lying between the pump body A and the retaining member B and compressedagainst the land A1 of the pump body is a disc or diaphragm C. It,together with the pump body A, completes the pump chamber A2. Thisdiaphragm may be 65 made of any suitable material and it serves 1930,Serial No. 489,747

merely as a sealing or closing member to complete the pump chamber.Positioned within the pump chamber or cavity A2 and bearing upon theportion A and upon the diaphragm C is a plurality of laminations C1which, together, form an internal laminated spring. They are so shapedland proportioned that they tend to force the diaphragm C outward and doso whenever they are free to move.

supported from and preferably made integral with the retaining member Bis a support D. This support is in effect a loop provided withoppositely placed parts which are fastened to the annulus B and'provided with a portion joining these two, so that it thus provides aloop over the valve disc or diaphragm.

E is a compression plate positioned against the diaphragm, C.A It isprovided with one generally fiat face which lies against the diaphragmand it is somewhat rounded or tapered away adjacent its edges as at E1.On its opposite face it carries a boss E2 and a helical race E3. Taperedrollers E4 are mounted to run in the helical race E3.

F is a rocking member provided with a depression F1 which is seated uponthe boss E2. The rocking member is provided on one face with a helicalrace F2 and on its opposite side with a fiat race F'3 within whichtapered rollers F4 are positioned and adapted to move. At one edge andextending outwardly from the rocking member F is a pair of ears F5, F5.Positioned between the ears is a drive rod or shaft F5 which may bemoved by any suitable mechanism back and forth, as indicated by thearrow in Figure 2. F1 is a boss formed on the member F, opposite thedepression F1.

G is a bearing supporting member resting upon the boss F7 of the memberF and provided with a flat bearing race G1.- The member G rests againstthe support D.

H is an inlet valve housing adapted to be seated in the cavity A3 in thepump body A. It is provided with a bore H1 which has at one end a valveseat portion H2- H3 is a valve positioned within the bore H1 andcarrying a head H4 adapted to be seated in the seat E2. A spring H5bearing at one end upon the valve and at the other upon the laminationsC1 tends to hold the valve seated.

I is an outletvalve housing provided with a bore I1 which terminates ina reduced portion P and has a seat I3 adjacent the reduced portion. 14is a valve formed with a point 15. The valve is positioned within thebore I1 and the point is adapted to be seated in the seat 13. 15 is aspring tending normally to hold the valve seated. The valve housings maybe held in the position shown by any suitable means, such for example asclamps, or they might be threaded into the valve body.

It will be realized that while I have herewith shown and described apractical operative device, nevertheless many changes might be made inthe size, shape, number and disposition of parts without departing fromthe spirit of my invention and I wish, therefore, that my showing betaken as in a sense diagrammatic. Particularly the form of the housingand the means for compressing or moving the diaphragm might be widelychanged, as might also particular structural details of the severalother parts of the device.

The use and operation of the invention are as follows:

With the parts assembled as shown, it is assumed that the diaphragm ordisc C is lying in a flat position and that fluid is within the pumpchamber. A heavy and preferably sudden pressure is exerted upon thediaphragm to force it inward against resistance of the laminations C1Lby movement of the shaft or rod FG, which movement causes the rockingmember F to move and the compression member or washer E is forcedagainst the diaphragm as a result of the motlon of the rocking memberwhich turns through a portion of a revolution and causes the rollerswhich engage it to ride upon the helicalrace formed on the back of themember E and on the face of the rocking member F. The side of therocking member away from the diaphragm has a fiat face which servesmerely as a thrust bearing, the other face of which is formed by themember G. This movement of the rocking member F is imparted to thediaphragm C, as explained, and forces it inwardly against the resistanceof the laminations C1, thus reducing the volume of the pump chamber,creating pressure Within it and forcing open the outlet valve anddischarging fiuid from the pump.

. After the discharge stroke the rocking member is moved in the reversedirection and the member E is permitted to fall back from the diaphragmas a result of the reverse movement given the rocking member with itshelical race. The diaphragm may then spring or move outwardly againunder the influence of the laminations C1, thus increasing the vo'lumeof the pump chamber, permitting or causing the outlet valve to close,creating a suction which opens the inlet valve and draws a fuel chargeinto the pump chamber. Thus a suction stroke is completed and the pumpconsists of the alternate compression and expansion or inward andoutward movement of the diaphragm in response to the wedging actionwhich is communicated to it by the movement of the rocking member F.

I claim:

1. In a pump, a pump housing and a fiexible diaphragm fixed to saidhousing in sealing contact and with it defining a pumping chamber, and aresistance member within the pump chamber, adapted to resist movement ofthe diaphragm and means for moving said diaphragm in opposition to theresistance of said resistance member, said means comprising a wedge, theresistance member comprising a laminated spring.

2. In a pump, a pump housing and a fiexible diaphragm fixed to saidhousing in sealing contact and with it defining a pumping chamber, andan approximately rigid resistance member within the pump chamber adaptedto resist movement of the diaphragm and means for moving said diaphragmin opposition to the resistance of said approximately rigid resistancemember, said means comprising a wedge.

3. In a pump, a pump housing and a fiexible diaphragm fixed to saidhousing in sealing contact and with it defining a pumping chamber, and aresistance member within the pump chamber comprising a laminated springadapted to resist movement of the diaphragm and means for moving saiddiaphragm in opposition to the resistance of said resistance member,said means comprising a wedge, adapted to be moved to exert pressureupon said diaphragm.

4. In a pump, a pump housing and a fiexible diaphragm fixed to saidhousing in sealing contact and with it defining a pumping chamber, and aresistance member within the pump chamber comprising a laminated springadapted to resist movement of the diaphragm and means for moving saiddiaphragm in opposition to the resistance of said resistance member,said means comprising a wedge positioned against and adapted to be movedto exert pressure upon said diaphragm.

5. In a pump, a pump housing and a fiexible diaphragm fixed to saidhousing in sealing contact and with it defining a pumping chamber, and aresistance member within the pump chamber adapted to resist movement ofthe diaphragm and means for moving said diaphragm in opposition to theresistance of said resistance member, said means comprising a wedge,said wedge carrying a helical race adapted to receive antifrictionmembers.

6. In a pump, a pump housing and a fiexible diaphragm fixed to saidhousing in sealing contact and with it defining a pumping chamber, andan approximately rigid resistance member within the pump chamber,adapted to resist movement of the diaphragm and means for moving saiddiaphragm in opposition to the resistance of said approximately rigidresistance member, said means comprising a wedge positioned against saiddiaphragm, said wedge carrying a helical race adapted to receiveanti-friction members.

7. In a pump, a pump housing and a fiexible diaphragm fixed to saidhousing in sealing contact and with it defining a pumping chamber, and aresistance member within the pump chamber adapted to resist movement ofthe diaphragm and means for moving said diaphragm in opposition to theresistance of said resistance member, said means comprising a wedgepositioned against and adapted to be moved to exert pressure upon saiddiaphragm, said wedge carrying a helical race adapted to receiveanti-friction members.

8. In a pump, a pump housing and a fiexible diaphragm fixed to saidhousing in sealing contact and with it defining a pumping chamber, andan approximately rigid resistance member within the pump chamber adaptedto resist movement of the diaphragm and means for moving said diaphragmin opposition to the resistance of said approximately rigid resistancemember, said means comprising a wedge positioned against and adapted tobe moved to exert pressure upon said diaphragm, said wedge carrying ahelical race adapted to receive anti-friction members.

9. In a pump, a pump housing and a fiexible diaphragm fixed to saidhousing in sealing contact and with it defining a pumping chamber,

and a resistance member within the pump chamber comprising a laminatedspring adapted to resist movement of the diaphragm and means for movingsaid diaphragm in opposition to the resistance of said resistancemember, said means comprising a wedge, and a member fixed with relationto the pump housing and mounted for co-operation with said Wedge.

10. In a pump, a pump housing and a fiexible diaphragm fixed to saidhousing in sealing contact and with it defining a pumping chamber, and aresistance member Within the pump chamber comprising a laminated springadapted to resist movement of the diaphragm and means for moving saiddiaphragm in opposition to the resistance of said resistance member,said means comprising a wedge adapted to be moved to exert pressure uponsaid diaphragm, and a member fixed with relation to the pump housing andmounted for cooperation with said wedge.

11. In a pump, a pump housing and a flexible diaphragm fixed to saidhousing in sealing contact and with it defim'ng a pumping chamber, and aresistance member Within the pump chamber adapted to resist movement ofthe diaphragm and means for moving said diaphragm in opposition to theresistance of said resistance member, said means comprising a wedgeadapted to be moved to exert pressure upon said diaphragm, said wedgecarrying a helical race adapted to receive anti-friction members, and amember fixed with relation to the pump housing and mounted forco-operation with said wedge.

12. In a pump, a pump housing and a fiexible diaphragm fixed to saidhousing in seaiing contact and with it defining apumping chamber, and aresistance member within the pump chamber adapted to resist movement ofthe diaphragm and means for moving said diaphragmin opposition to theresistance of said resistance member, said means comprising a wedgepositioned against and adapted to be moved to exert pressure upon saiddiaphragm, said wedge carrying a helical race adapted to receiveanti-friction members, and a member fixed with relation to the pumphousing and mounted for co-operation with said wedge.

13. In a pump, a pump housing and a fiexible diaphragm fixed to saidhousing in sealing contact and with it defining a pumping chamber, and aresistance member within the pump chamber comprising a laminated springadapted to resist movement of the diaphragm and means for moving saiddiaphragm in opposition to the resistance of said resistance member,said means comprising a wedge and means for moving said wedge.

14. In a pump, a pump housing and a fiexible diaphragm fixed to saidhousing in sealing contact and with it defining a pumping chamber, and aresistance member within the pump chamber comprising a laminated springadapted to resist movement of the diaphragm and means for moving saiddiaphragm in opposition to the resistance of said resistance member,said means comprising a wedge adapted to be moved to exert pressure uponsaid ldiaphragm, and means for moving said wedge.

15. InA a pump, a pump housing and a flexibie diaphragm fixed to saidhousing in sealing contact and with it defining a pumping chamber, anda. resistance member within the pump chamber adapted to resist movementof the diaphragm andmeans for moving said diaphragm in opposition to theresistance of said resistance member, said means comprising a wedgeadapted to be moved to exert pressure upon said diaphragm, said wedgecarrying a helicai race adapted to receive Vantifriction members, andmeans for moving said wedge.

16. In a pump, a pump housing and a fiexible diaphragm fixed to saidhousing in sealing contact and With it defining a pumping chamber, andan approximately rigid resistance member within the pump chamber adaptedto resist movement of the diaphragm, and means for moving said diaphragmin opposition to the resistance of said approximately rigid resistancemember, said means comprising a wedge positioned against and adapted tobe moved to exert pressure upon said diaphragm, said wedge carrying ahelical race -adapted to receive anti-friction members, and

means for moving said wedge.

PHILIP LANE SCOTT.

